Surfacing machine



April 13 1926.

J. SODERBERG SURFAGING IAOHINE Filed May 13. 1924 4 sneek-sheet 1 April 13 1926. 1,580,175 J. SODERBERG SURFACING MACHINE v Y Filed May 13. 1924 4 Sheets-Sheet 3 April 13 1926. Y 1,580,175

J. soDERBERG SURFCING MACHINE 4 Filed May 13, 1924 #Sheets-,Sheet 4 Patented Apr. 13,A 1926.

UNITED STATES 1,580,175 PATENT OFFICE.

JACOB SODERCBERG, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOB T0 PITTSBURGH PLATE GLASS COMPANY, A CORPORATION OF PENNSYLVANIA.

SUBFACING MACHINE.

Application tiled Hay 13, 1924. Serial N0. 713,111.

To all whom z't may concern:

Be it known that I, JAooE SODERBERG, a citizen of the United States, and a resi- .dent of Pittsburgh,` in the county of Allegheny and State of Pennsylvania; have made .a new and useful invention in Improvements in a Surfacing Machine, of which the following is a specification.

The invention relates to surfacing machines and particularly to grinding machines for use in connection with facing and smoothing plate glass, such as shown in my pending application, Serial No. 593,7 60, w erein the spindles ofthe grinding runners are driven and the glass, mounted on cars or tables, is carried beneath the runners of a series of machines. The invention is directed, toward the provision of improved means for connecting the runner of the machine to its s indle so as to permit a limited and varia le amount of rocking movement of the runner in order to secure the functions and results as hereinafter more fully set forth. One embodiment of the invention is illustrated in the accompanying drawings wherein:

Figure 1 is a plan view of the central portion of a runner equipped with the improved spindle connecting means, but with the shield and hopper (shown in Fig. 2) removed. -lFi 2 1s a section on the line ll-H of Fig. 1. Figs. 3 and 4 are sections vert1cal sections taken at right angles to each other.

Referring to Figs. 1 to 4, 1 is the main runner casting, only the central portion of which is shown. Such casting has a socket 2 at its central portionA for receiving the connection between the spindle and the runner, and upon the lower side of the casting is the usual planking 3, to which the runner bars 4 are secured. The lower side of they socket 2 is closed by the plate 5, in-

Fig. 6 comprises two views of tegral with the castin 1 and rovided with four perforations 6 ig. 4) t rough which a mixture of abrasive' and water is. supplied as hereinafter explained.

i The spindle 7 is mounted for rotation in the fixed framework or casing of themachine, the lower end 8 only of which is shown, and this spindle is driven in any desired manner, such as that illustrated in my ap lication heretofore referred to. A roller earing is carried by the lower end of the casing and this 'casing also carries a stufling box 10 for preventing the lubrication supplied to the bearings from leaking out along the spindle.

The lower end of the spindle fits into the spindle block 11 and is secured therein by means of the key 12. This block is con-4 structed as indicated in Fig. 5 and is provided with a pair of hubs 13, 13 adapted to receive the bearing shafts 14, 14 (Fig. 2) secured against rotation in the yoke 15 by means ofthe transverse keys 16, 16. The block is also provided with a pairof laterally extending integral lugs 17, 17 in which are mounted the adjustable stop bolts 18, 18 (Figs. 1 and 3). This arrangement provides for .the rocking movement of the yoke 15 in one direction with respect to the block 11, the ends of the screws being adapted to engage projections 18 integral with the yoke 15. l

The yoke 15 shown in detail in Fig. 7 surrounds the runner block 11 and is provided with a pair of laterally extending journal members 19, 19 mounted for oscillating movement in the journal boxes 20, 20 mounted in the runner socket 2. This `mounting of the yoke provides for the rocking of the Yrunner relative to the spindle 7 in a plane at right angles to th rocking movement of the yoke 15 with respect to the spindle, so that the runner itself is free to rock in both directions, iving it a universal joint sup- I with respect to the spindle so that it can accommodate itself to the surface of thel glass being surfaced, but this rocking move# ment should be limited within relatively narrow limits in order to avoid the danger of chipping the glass whenthe runner is lowered,l such aswould occur if the runner were inclined at too great an angle when it came into contact 4with the glass. The use of the stop bolts permits the accurate adjustment of the tilting movement" of 'the runner within the desired limits after the runners have been' 'assembled upon their spindles. v l

Mounted on the lrunner above the rocking connections is t-lie hopper or box 24 for receiving the mixture of abrasive and water which is to be used and which is supplied to the cavity 25 (Fig.4) beneath the runner through the perforations 6. This hopper or box is preferably constructed as indicated in detail in Fig. '8, the construction being such that the hopper performs the additional function of a housing or protector for the rocking yoke and block construction heretofore described.4 This is accomplished by the provision of the flange 26 fitting the annular surface of the ruimer surrounding the cavity 2 and held in position by means of thebolts 27. The inner portion of the hopper fits around the runner `block 11 as indicated in Fig. 2, the effectiveness of4 the.

closure at this oint being increased by the use of the was er 28 litting into` a recess at the top of the hopper and restino' upon the top surface of the runner block. By this means any accumulation of sand or `other dirt in the socket 2 is prevented so that the wearing of the pivotal connections is reduced to a minimum and the .stop devices are not interfered with such as would be the case if sand' or dirt were permitted to work into the recess 2 and between the stop surfaces.

The runner casting adjacent its central portion is provided with four upstanding tubular members 29 which act as conduits between the hopper cavity and the perforations 6 as indicated in Figs. 4 and 1 and these tubular portions are preferably lined withvpieces of rubber tubing 30, such tubing serving to insurea tight connection at the 'oints 31 between the lower surface of the opper and the upper ends of the tubular 'members 29. These rubber linings also serve to eliminate the wear of the abrasive upon the inner surfaces of the tubular members The wear-upon rubber, by abrasive is relatively slight as com ared with wear by abrasive upon metal'an the rubber tubing may be easily replaced from time to time when it is worn out.

' A guard is also provided intermediate the lower end of the casing 8 and the upper side ofthe hopper 24 by the use of the guard or shield 32 shown in detail in Fig. 6. This shield is made in two sections clamped to` gether and provided with a groove 33 which engages a rib at the lower end of the casing y8 as indicated in Fig. 2., The lower end of this guard or casing projects down into the abrasive hopper or box in such manner as to prevent the entrance of any abrasive to the interior of the guard. In this manner every precaution is provided for protecting j the parts beneath the hopper from abrasive and other dirt which would tend toreduce' is supplied to the hopper. This support is' preferably accomplished by means of the blocks 35 in which the tubes 34 are held by means of the set screws 36. The inner ends of the blocks are provided with stems 37 which project into openings 38 provided in the walls of the shield, such stems being secured in place by means of the set screws 39. The advantages of the structure incident to its compactness, its facility of adjustment and the protection of the wearing parts will readily be apparent to those skilled in the art.

What I claim is: v

1. In combination, a vertical spindle, a block in which the lower end of the spindle Ais mounted, a yoke pivoted to the block for rocking movement about a horizontal axis, a runner pivoted to t-he yoke for rocking movement about a horizontal axis at right angles to said axis about which the yoke pivots, interengaging stop means on the lock and yoke forl limiting the rocking movement of the yoke, and other interengaging stop means on the yoke and runner for limiting the rocking movement of the runner.

2. In combination, a vertical spindle, a block in which the lower end of the spindle is mounted, av yoke pivoted to the block for rocking movement about a horizontal axis, a runner pivoted to the yoke for rocking movement about a horizontal axis-at right angles to said axis about which the yoke pivots, interengaging adjustable sto means on lthe block and yoke, including a t readed lblock in which the lower end of the spindle is mounted, a yoke pivoted to the block for rocking movement about a horizont-al axis,

a runner pivoted to the yoke for rocking movement about a horizontal axis at right angles to said axis about which the yoke pivots, an annular abrasive receiving hop er or box secured to the runner and fitting around the spindle and constitutin a housing for the yoke and block, a. con uit leading through the yoke from the hopper or box to the lowerside of the runner, and a conduit for su plying a mixture of abrasive and water to t e hopper.

4, In combination, a vertical spindle, a block in which the lower end of the spindle is mounted, a yoke pivoted to the block for rocking movement about a horizontal axis, a runner pivoted to the yoke for rocking movement about a horizontal axis at right angles to said axis about which the yoke pivots, a casing in which the spindle is journalled, an annular abrasive receiving hopper or box secured to the runner and fitting around the spindle and constitutin a housing for the yoke and block, a conduit leading 'through the yoke from the hopper or box to the lower side of the runner, a shield or guard surrounding the spindle intermediate the lower end of said casing and the hopper or box and supported from such casingiland a supply con uit supported upon said s 'eld and positioned so as to discharge into the hopper or box.

5. In combination, a vertical spindle, a block in which the lower end of the spindle is mounted, a yoke pivoted to the block for rocking movement about a horizontal axis, a runner pivoted to the yoke for rocking movement about a horizontal axis at right angles-to said axis about which the oke pivots, a casing in which the spindle is ]our nailed, an annular abrasive receivin hopper or box secured to the runner and fitting around the spindle and constitutin a housing for the oke and block, and having a discharge out et, a tubular member integral with the runner adjacent the center thereof extending up through said yoke to the bottom of the hopper or box and registering with the discharge opening therein, and a lining for said tubular member in the form of a tube of rubber composition.

In testimony whereof, I` have hereunto subscribed my name this fth day of May,

JACOB SODERBERG. 

